You would need to pull one of the pickups ( I would suggest the neck pickup) and follow the grain and center seam into the cavity using a bright light and be sure that the grain and the center seam is continuous. It can be really hard to tell.
If it is veneer then it is an LS80 or 120. 80 is poly, 120 is lacquer
The model number may be marked in the neck pickup cavity.
If you don't see a model number in there, an acetone test may tell you which is which if you can do it inside the cavity compartment.
An LS120 (lacquer) should react to acetone, and an LS80 (poly) will not.